As long as /RESET does not exceed VBIAS + 0.3V, there should not be any permanent damage or failure. The /RESET pin will just loose functionality.
MAX16956
Production
The MAX16956 is a small, synchronous buck converter with integrated high-side and low-side switches. The device is designed to deliver up to 300mA with...
Datasheet
MAX16956 on Analog.com
As long as /RESET does not exceed VBIAS + 0.3V, there should not be any permanent damage or failure. The /RESET pin will just loose functionality.